Quote Originally Posted by CuatrodeMayo View Post
Cast stone is essentially concrete. Concrete can always be guaranteed to do 2 things: get hard & crack. Unless these are major structural cracks (i.e. one section is displaced from another) there is not much reason to be concerned from a safety standpoint. It's likely simply a cosmetic thing. And unless you are crawling around on the roof, you will probably never even notice the cracks.
People don't realize that concrete is in an ever-hardening state. It never stops curing, while most of the curing takes place days and weeks after it's poured, it still cures indefinitely. It will eventually get so hard it starts to crack and then starts very slowly returning back to it's natural state.